Current Optics and Photonics

Optical Society of Korea (한국광학회)
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Analysis of Laser-protection Performance of Asymmetric-phase-mask Wavefront-coding Imaging Systems

  • Yangliang, Li (State Key Laboratory of Pulsed Power Laser Technology, National University of Defense Technology) ;
  • Qing, Ye (State Key Laboratory of Pulsed Power Laser Technology, National University of Defense Technology) ;
  • Lei, Wang (State Key Laboratory of Pulsed Power Laser Technology, National University of Defense Technology) ;
  • Hao, Zhang (State Key Laboratory of Pulsed Power Laser Technology, National University of Defense Technology) ;
  • Yunlong, Wu (State Key Laboratory of Pulsed Power Laser Technology, National University of Defense Technology) ;
  • Xian'an, Dou (State Key Laboratory of Pulsed Power Laser Technology, National University of Defense Technology) ;
  • Xiaoquan, Sun (State Key Laboratory of Pulsed Power Laser Technology, National University of Defense Technology)
  • Received : 2022.08.09
  • Accepted : 2022.12.09
  • Published : 2023.02.25
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Abstract

Wavefront-coding imaging can achieve high-quality imaging along with a wide range of defocus. In this paper, the anti-laser detection and damage performance of wavefront-coding imaging systems using different asymmetric phase masks are studied, through modeling and simulation. Based on FresnelKirchhoff diffraction theory, the laser-propagation model of the wavefront-coding imaging system is established. The model uses defocus distance rather than wave aberration to characterize the degree of defocus of an imaging system. Then, based on a given defocus range, an optimization method based on Fisher information is used to determine the optimal phase-mask parameters. Finally, the anti-laser detection and damage performance of asymmetric phase masks at different defocus distances and propagation distances are simulated and analyzed. When studying the influence of defocus distance, compared to conventional imaging, the maximum single-pixel receiving power and echo-detection receiving power of asymmetric phase masks are reduced by about one and two orders of magnitude respectively. When exploring the influence of propagation distance, the maximum single-pixel receiving power of asymmetric phase masks decreases by about one order of magnitude and remains stable, and the echodetection receiving power gradually decreases with increasing propagation distance, until it approaches zero.

Keywords

Acknowledgement

Technology Domain Fund of 173 Project (2021-JCJQ-JJ-0284); Anhui Provincial Natural Science Foundation (1908085QF275); Natural Science Foundation of Anhui Province (1908085MF199); Research Project of the National University of Defense Technology (ZK20-41).

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